Consolidated Statements of Stockholders’ Equity - USD ($) shares in Thousands, $ in Thousands	Total	Class A	Class B	Common stock Class A	Common stock Class B	Treasury stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated deficit
Beginning balance (in shares) at Jan. 31, 2022				458,773	82,453
Beginning balance (in shares) at Jan. 31, 2022						0
Beginning balance at Jan. 31, 2022	$ 1,921,917			$ 4	$ 1	$ 0	$ 3,406,959	$ 10,899	$ (1,495,946)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				4,770
Issuance of common stock upon exercise of stock options	8,245						8,245
Vesting of early exercised stock options	1,357						1,357
Issuance of common stock upon settlement of restricted stock units (in shares)				13,644
Issuance of common stock upon settlement of restricted stock units	1			$ 1
Tax withholdings on settlement of restricted stock units (in shares)				(4,646)
Tax withholdings on settlement of restricted stock units	(75,181)						(75,181)
Charitable donation of Class A common stock (in shares)				300
Charitable donation of Class A common stock	5,499						5,499
Shares issued in connection with business acquisition (in shares)				570
Shares issued in connection with business acquisition	2,965						2,965
Issuance of common stock under the employee stock purchase plan (in shares)				1,190
Issuance of common stock under the employee stock purchase plan	15,804						15,804
Repurchase of unvested early exercised stock options (in shares)				(441)
Stock-based compensation	371,190						371,190
Other comprehensive income (loss), net of tax	(3,287)							(3,287)
Net loss	(328,352)	$ (278,950)	$ (49,402)						(328,352)
Ending balance (in shares) at Jan. 31, 2023				474,160	82,453
Ending balance (in shares) at Jan. 31, 2023						0
Ending balance at Jan. 31, 2023	1,920,158			$ 5	$ 1	$ 0	3,736,838	7,612	(1,824,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)				5,221
Issuance of common stock upon exercise of stock options	6,728						6,728
Vesting of early exercised stock options	2						2
Issuance of common stock upon settlement of restricted stock units (in shares)				17,695
Tax withholdings on settlement of restricted stock units (in shares)				(6,061)
Tax withholdings on settlement of restricted stock units	(113,162)						(113,162)
Charitable donation of Class A common stock (in shares)				281
Charitable donation of Class A common stock	4,215						4,215
Repurchase of Class A common stock (in shares)				(5,800)		(5,840)
Repurchase of Class A common stock	(102,615)					$ (102,615)
Issuance of common stock under the employee stock purchase plan (in shares)				1,364
Issuance of common stock under the employee stock purchase plan	17,313						17,313
Stock-based compensation	372,145						372,145
Other comprehensive income (loss), net of tax	1,213							1,213
Net loss	$ (89,883)	$ (76,739)	$ (13,144)						(89,883)
Ending balance (in shares) at Jan. 31, 2024		492,660	82,453	492,660	82,453
Ending balance (in shares) at Jan. 31, 2024	(5,840)					(5,840)
Ending balance at Jan. 31, 2024	$ 2,016,114			$ 5	$ 1	$ (102,615)	4,024,079	8,825	(1,914,181)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	4,002			4,002
Issuance of common stock upon exercise of stock options	$ 8,032						8,032
Vesting of early exercised stock options	2						2
Issuance of common stock upon settlement of restricted stock units (in shares)				15,357
Tax withholdings on settlement of restricted stock units (in shares)				(5,170)
Tax withholdings on settlement of restricted stock units	(79,299)						(79,299)
Charitable donation of Class A common stock (in shares)				281
Charitable donation of Class A common stock	6,564						6,564
Repurchase of Class A common stock (in shares)				(31,800)		(31,781)
Repurchase of Class A common stock	(392,164)					$ (392,164)
Issuance of common stock under the employee stock purchase plan (in shares)				1,550
Issuance of common stock under the employee stock purchase plan	15,708						15,708
Stock-based compensation	358,214						358,214
Other comprehensive income (loss), net of tax	(13,715)							(13,715)
Net loss	$ (73,694)	$ (62,842)	$ (10,852)						(73,694)
Ending balance (in shares) at Jan. 31, 2025		508,680	82,453	508,680	82,453
Ending balance (in shares) at Jan. 31, 2025	(37,621)					(37,621)
Ending balance at Jan. 31, 2025	$ 1,845,762			$ 5	$ 1	$ (494,779)	$ 4,333,300	$ (4,890)	$ (1,987,875)